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12.2.3 Step 4: Determine system requirements and options • High wall inverter unit. • Single-split. • Non-ducted. • High star rating for good energy efficiency performance. • Low noise. 12.2.4 Step 5: Select system/model to suit all requirements In this case, a high wall indoor unit with low indoor and outdoor noise could be selected. The table below gives sample data for heat pumps – installers will need to use product-specific data. The design temperature is 0°C and the heat required is 5.1 kW. Model B is sufficient in this case, as it provides a heating output of 5.1 kW. Model A: Capacity 4.0 kW rated output Indoor (°C) Outdoor (°C) 20 -10 -5 0 2 7 Output Input COP Output Input COP Output Input COP Output Input COP Output Input COP 2.4 0.77 3.12 2.88 0.91 3.15 3.7 1.1 3.31 3.8 1.12 3.4 4.1 1.18 3.5 Model B: Capacity 6.0 kW rated output Indoor (°C) Outdoor (°C) 20 -10 -5 0 2 7 Output Input COP Output Input COP Output Input COP Output Input COP Output Input COP 3.6 1.3 2.76 4.32 1.54 2.8 5.1 1.71 2.98 5.2 1.75 3.0 6.1 1.9 3.2 Model C: Capacity 8.0 kW rated output Indoor (°C) Outdoor (°C) 20 -10 -5 0 2 7 Output Input COP Output Input COP Output Input COP Output Input COP Output Input COP 4.8 1.85 2.59 5.65 2.05 2.75 6.2 2.25 2.8 6.4 2.4 2.7 8.1 2.6 3.1 12.2.5 Step 6: Locate the units Outdoor unit There are a few options for the outdoor unit. It would be best to avoid the area around the double doors as it is used for outdoor living. Outside the kitchen is appropriate as long as the occupants don’t have an issue with it being close to their front door – see location on plan at A. Another option is on the bathroom or laundry wall. In this case, pipework needs to be planned at the design stage of building. Indoor unit The indoor unit can be placed on the external wall on the family side of the kitchen. It is important not to have steam from cooking underneath the unit – in this case, that is not likely. 60PDF Image | Heat pump installation Good Practice Guide
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